Rigid interconnection complete equipment suitable for economic operation of power distribution area and control method

Abstract

The invention discloses rigid interconnection complete equipment suitable for economic operation of a power distribution area and a control method, and relates to the technical field of transformer control of the power distribution area, and the rigid interconnection complete equipment comprises two low-voltage interconnection complete equipment which are respectively arranged in a target power distribution area and an opposite-side power distribution area; the wire inlet end of the wire inlet circuit breaker is connected with a low-voltage pile head of the distribution transformer, and the wire outlet end is connected with an in-cabinet low-voltage busbar; an intelligent fuse is arranged between a wire inlet pile head of the distribution transformer and the high-voltage side; the wire inlet end of the interconnecting circuit breaker is connected with the low-voltage busbar in the cabinet, and the wire outlet end of the interconnecting circuit breaker is connected to the wire outlet end of the interconnecting circuit breaker of the low-voltage interconnection complete equipment on the opposite side; the interconnection coordination control unit is respectively in communication connection with the intelligent fuse, the inlet wire circuit breaker, the interconnection circuit breaker and the transformer area intelligent fusion terminal, and is also in communication connection with the interconnection coordination control unit of the low-voltage interconnection complete equipment on the opposite side; the transformer area intelligent fusion terminal is in communication connection with the cloud master station. According to the invention, the technical problem of high cost of the existing transformer area interconnection mode is relieved.

Description

Technical Field

[0001] The invention relates to the technical field of transformer control in a distribution station area, and in particular to a rigid interconnection complete set of equipment and a control method suitable for economical operation of a distribution station area. Background Art

[0002] In some cities, the seasonal power load of the outgoing line area has increased due to electric heating in winter and air conditioning in summer after coal-to-electricity conversion. In order to solve the problem of power safety, the power supply company built a new transformer next to the original low-voltage distribution area transformer (no more than 20 meters away) and carried out load shedding. Although the power load problem was fundamentally solved, the two distribution transformers simultaneously appeared in light load or no-load operation with a load rate of less than 20% in spring and autumn.

[0003] The main losses of transformers include two parts: no-load loss and load loss. These losses account for about 50% of the total loss of the distribution network, which is a very high proportion and cannot be ignored. Especially in the low electricity consumption period, when the load is small and the operating voltage is high, the no-load loss is even greater, which is very unfavorable for the optimized operation of the distribution transformer.

[0004] With the development of power electronics, the more popular way of interconnecting substations at this stage is flexible interconnection of substations, which can achieve power sharing between substations, but the cost is relatively high, generally in the millions. Summary of the invention

[0005] The purpose of the present invention is to provide a rigid interconnection device and control method suitable for economical operation of distribution station areas in order to solve at least one of the above technical problems.

[0006] In the first aspect, an embodiment of the present invention provides a rigid interconnection complete set suitable for economic operation of a distribution station area, comprising two low-voltage interconnection complete sets respectively arranged in a target distribution station area and an opposite distribution station area, each low-voltage interconnection complete set being respectively connected to a distribution transformer of the opposite distribution station area; the low-voltage interconnection complete set comprising: an area intelligent fusion terminal, an interconnection coordination control unit, an intelligent fuse, an incoming line circuit breaker and a connecting circuit breaker; wherein the incoming line end of the incoming line circuit breaker is connected to the low-voltage pole head of the distribution transformer, and the outgoing line end of the incoming line circuit breaker is connected to the low-voltage busbar in the cabinet; the intelligent fuse is arranged between the incoming line pole head and the high-voltage side of the distribution transformer; the incoming line end of the connecting circuit breaker is connected to the low-voltage busbar in the cabinet, and the outgoing line end of the connecting circuit breaker is connected to the outgoing line end of the connecting circuit breaker of the opposite low-voltage interconnection complete set; the interconnection coordination control unit It is respectively communicatively connected with the intelligent fuse, the incoming line circuit breaker, the interconnecting circuit breaker and the substation intelligent fusion terminal; the interconnection coordination control unit is also communicatively connected with the interconnection coordination control unit of the opposite low-voltage interconnection complete set; the substation intelligent fusion terminal is communicatively connected with the cloud master station; the substation intelligent fusion terminal is used to obtain fuse data and circuit breaker data through the interconnection coordination control unit and report them to the cloud master station, and receive control instructions from the cloud master station and forward them to the interconnection coordination control unit, so that the interconnection coordination control unit controls the on and off of the intelligent fuse, the incoming line circuit breaker and the interconnecting circuit breaker based on the control instructions; the substation intelligent fusion terminal is also used to control the switching of the operation mode based on the fuse data and the circuit breaker data; the operation mode includes an interconnection operation mode, an independent operation mode and a parallel operation mode.

[0007] Furthermore, the incoming circuit breaker comprises a fast-acting intelligent incoming circuit breaker, and the connecting circuit breaker comprises a fast-acting intelligent connecting circuit breaker.

[0008] Furthermore, the interconnection coordination control unit is respectively connected to the intelligent fuse, the incoming line circuit breaker, the connecting circuit breaker and the substation intelligent fusion terminal through RS485 bus communication.

[0009] Further, the interconnection coordination control unit includes a fuse acquisition module, a circuit breaker acquisition module, a communication unit interaction module and an upward communication module; wherein the fuse acquisition module is used to interact with the intelligent fuse through the Modbus protocol, collect fuse data and issue fuse control instructions; the fuse data includes the three-phase position of the intelligent fuse; the circuit breaker acquisition module is used to interact with the incoming circuit breaker and / or the connecting circuit breaker through the DLT645 protocol, collect circuit breaker data and issue circuit breaker control instructions Command; the circuit breaker data includes voltage, current, power, and switch position information; the communication unit interaction module is used to interact with the interconnection coordination control unit of the opposite low-voltage interconnection complete set through a peer-to-peer communication protocol, exchange the fuse data and the circuit breaker data, and exchange control instructions on both sides; the upward communication module is used to send the fuse data and circuit breaker data of the target distribution substation and the opposite distribution substation to the substation intelligent fusion terminal through the DLT698 protocol, and receive the control instructions issued by the substation intelligent fusion terminal.

[0010] Furthermore, the substation intelligent fusion terminal is connected to the cloud master station via 4G network communication.

[0011] Furthermore, the interconnection coordination control units of the two low-voltage interconnection complete sets are connected via RS485 bus communication.

[0012] In the second aspect, an embodiment of the present invention also provides a control method for a rigid interconnected complete set of equipment suitable for economical operation of a distribution substation, comprising: based on the fuse data and the circuit breaker data, respectively calculating the first load rate of the distribution transformer of the target distribution substation and the second load rate of the distribution transformer of the opposite distribution substation; based on the first load rate and the second load rate, respectively calculating the substation load rates in the interconnected operation mode, the independent operation mode and the parallel operation mode; based on the substation load rate and in accordance with the most economical method, determining the target operation mode; based on the target operation mode, controlling the on and off of the intelligent fuses, incoming circuit breakers and connecting circuit breakers of two low-voltage interconnected complete sets of equipment arranged in the target distribution substation and the opposite distribution substation.

[0013] Furthermore, the method based on the most economical goal includes: the load rate in the economic operation range is 30% to 75%.

[0014] Furthermore, based on the substation load rate and in accordance with the most economical method, a target operating mode is determined, including: if the first load rate and the second load rate are both less than 30% in the independent operation mode, and the first load rate and the second load rate are both less than 75% in the interconnected operation mode, the target operating mode is switched to the interconnected operation mode; if the first load rate or the second load rate is greater than 75% in the interconnected operation mode, the target operating mode is switched to the independent operation mode.

[0015] In a third aspect, an embodiment of the present invention further provides a computer-readable storage medium, wherein the computer-readable storage medium stores computer instructions, and when the computer instructions are executed by a processor, the method provided in the embodiment of the present invention is implemented.

[0016] The embodiment of the present invention provides a rigid interconnection device and control method suitable for the economic operation of a distribution station area, which realizes AC interconnection of the station area through a fast-acting connecting switch. Compared with flexible interconnection, it has lower cost and higher economic benefits, and alleviates the technical problem of high cost of existing station area interconnection methods. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The accompanying drawings constituting a part of the present invention are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the accompanying drawings:

[0018] Figure 1 A schematic diagram of a rigid interconnection complete set of devices suitable for economical operation of a distribution station area provided by an embodiment of the present invention;

[0019] Figure 2 A schematic diagram of another rigid interconnection complete set of devices suitable for economical operation of a distribution station area provided by an embodiment of the present invention;

[0020] Figure 3 A schematic diagram of a software architecture provided for an embodiment of the present invention;

[0021] Figure 4 A flow chart of a control method for a rigid interconnection complete set of devices suitable for economical operation of a distribution station area provided by an embodiment of the present invention;

[0022] Figure 5 A schematic diagram of a switch switching sequence when switching from an independent operation mode to an interconnected operation mode provided by an embodiment of the present invention;

[0023] Figure 6 A schematic diagram of a switch switching sequence when switching from an interconnected operation mode to an independent operation mode is provided in an embodiment of the present invention. DETAILED DESCRIPTION

[0024] The present invention will be described in detail below with reference to the accompanying drawings and in combination with embodiments. It should be noted that the embodiments and features in the embodiments of the present invention can be combined with each other without conflict.

[0025] The following detailed description is an exemplary description, which is intended to provide further detailed description of the present invention. Unless otherwise specified, all technical terms used in the present invention have the same meaning as those generally understood by those skilled in the art to which the present invention belongs. The terms used in the present invention are only for describing specific embodiments, and are not intended to limit the exemplary embodiments according to the present invention.

[0026] Embodiment 1

[0027] Figure 1 Schematic diagram of a rigid interconnection complete set of devices suitable for economical operation of a distribution station area provided according to an embodiment of the present invention. Figure 1 As shown, the device includes two low-voltage interconnection complete sets 100 respectively arranged in the target distribution substation area and the opposite distribution substation area, and each low-voltage interconnection complete set 100 is respectively connected to the distribution transformer 200 of the opposite distribution substation area. Figure 1 As shown, the low-voltage interconnection complete set 100 includes: an area intelligent fusion terminal 110, an interconnection coordination control unit 120, an intelligent fuse 130, an incoming line circuit breaker 140 and a connecting circuit breaker 150.

[0028] Specifically, the incoming end of the incoming circuit breaker 140 is connected to the low-voltage pole head of the distribution transformer 200, and the outgoing end of the incoming circuit breaker 140 is connected to the low-voltage busbar 160 in the cabinet; an intelligent fuse 130 is arranged between the incoming pole head and the high-voltage side of the distribution transformer 200; the incoming end of the connecting circuit breaker 150 is connected to the low-voltage busbar 160 in the cabinet, and the outgoing end of the connecting circuit breaker 150 is connected to the outgoing end of the connecting circuit breaker 150 of the opposite low-voltage interconnection complete set.

[0029] The interconnection coordination control unit 120 is respectively communicated with the intelligent fuse 130, the incoming circuit breaker 140, the connecting circuit breaker 150 and the substation intelligent fusion terminal 110; the interconnection coordination control unit 120 is also communicated with the interconnection coordination control unit 120 of the opposite low-voltage interconnection complete set; the substation intelligent fusion terminal 110 is communicated with the cloud master station.

[0030] The substation intelligent fusion terminal 110 is used to obtain fuse data and circuit breaker data through the interconnection coordination control unit 120 and report them to the cloud master station, and receive control instructions from the cloud master station and forward them to the interconnection coordination control unit 120, so that the interconnection coordination control unit 120 controls the on and off of the intelligent fuse 130, the incoming circuit breaker 140 and the connecting circuit breaker 150 based on the control instructions.

[0031] The fuse data includes data acquired from the smart fuse 130 , and the circuit breaker data includes data acquired from the incoming circuit breaker 140 and the tie circuit breaker 150 .

[0032] The substation intelligent fusion terminal 110 is also used to control the switching of the operation mode based on the fuse data and the circuit breaker data; wherein the operation mode includes an interconnected operation mode, an independent operation mode and a parallel operation mode.

[0033] Preferably, the smart fuse 130 is composed of a smart fuse body and a controller, realizing main functions such as smart fuse opening and closing position signal collection, remote control and local control.

[0034] Preferably, the incoming circuit breaker 140 comprises a fast-acting intelligent incoming circuit breaker, and the connecting circuit breaker 150 comprises a fast-acting intelligent connecting circuit breaker. The fast-acting switch has an opening speed of less than or equal to 5ms and a closing speed of less than or equal to 15ms.

[0035] Preferably, the interconnection coordination control unit 120 is respectively connected to the intelligent fuse 130, the incoming circuit breaker 140, the connecting circuit breaker 150 and the substation intelligent fusion terminal 110 through RS485 bus communication.

[0036] Preferably, the interconnection coordination control units 120 of the two low-voltage interconnection complete sets are connected via RS485 bus communication.

[0037] In an optional implementation provided by an embodiment of the present invention, the interconnection coordination control unit 120 has three half-duplex RS485 communication interfaces and one full-duplex communication interface.

[0038] Figure 2 FIG. 1 is a schematic diagram of another rigid interconnection complete set of devices suitable for economical operation of a distribution station area according to an embodiment of the present invention. Figure 2 As shown, the interconnection coordination control unit 120 includes a fuse acquisition module 121, a circuit breaker acquisition module 122, a communication unit interaction module 123 and an upward communication module 124. The interconnection coordination control unit 120 includes four RS485 communication interfaces, namely RS485-1, RS485-2, RS485-3 and RS485-4.

[0039] Specifically, Figure 2 As shown, the fuse acquisition module 121 is connected to the intelligent fuse 130 through the RS485-2 communication interface and the RS485 communication bus, and is used to interact with the intelligent fuse 130 through the Modbus protocol, collect fuse data and issue fuse control instructions; the fuse data includes the A / B / C three-phase position of the intelligent fuse 130; the fuse control instructions include instructions for controlling the opening and closing of the A / B / C three-phase fuse tubes.

[0040] The circuit breaker acquisition module 122 is connected to the incoming circuit breaker 140 and the connecting circuit breaker 150 through the RS485-3 communication interface and the RS485 communication bus, and is used to interact with the incoming circuit breaker 140 and / or the connecting circuit breaker 150 through the DLT645 protocol to collect circuit breaker data and issue circuit breaker control instructions; the circuit breaker data includes voltage, current, power, and switch position information; the circuit breaker control instructions include circuit breaker closing and opening instructions.

[0041] The communication unit interaction module 123 is connected to the interconnection coordination control unit 120 of the opposite low-voltage interconnection complete set through the RS485-4 communication interface and the RS485 communication bus, and is used to interact with the interconnection coordination control unit 120 of the opposite low-voltage interconnection complete set through the peer-to-peer communication protocol, exchange fuse data and circuit breaker data, and exchange control instructions on both sides. Specifically, the interaction includes: exchanging the electrical quantity data of the respective fuses, incoming circuit breakers, and interconnecting circuit breakers; accepting the control instructions of the opposite coordination control unit to control the fuses, incoming circuit breakers, and interconnecting circuit breakers in this area to close and open; sending control instructions to the opposite coordination control unit to control the fuses, incoming circuit breakers, and interconnecting circuit breakers in the opposite area to close and open.

[0042] The upward communication module 124 is connected to the substation intelligent fusion terminal 110 through the RS485-1 communication interface and the RS485 communication bus, and is used to send the fuse data and circuit breaker data of the target distribution substation and the opposite distribution substation to the substation intelligent fusion terminal 110 through the DLT698 protocol, and to receive the control instructions issued by the substation intelligent fusion terminal 110.

[0043] Preferably, the substation intelligent fusion terminal 110 is connected to the cloud master station via 4G network communication.

[0044] Specifically, in an embodiment of the present invention, the intelligent fuse 130, the incoming circuit breaker 140 and the interconnecting circuit breaker 150 serve as execution units to send electrical quantity data to the interconnection coordination control unit 120, and at the same time accept the control instructions of the interconnection coordination control unit 120 to execute closing and opening; the interconnection coordination control unit 120 collects the circuit breaker data and fuse data in the substation and sends them to the substation intelligent fusion terminal 110, and at the same time forwards the control instructions issued by the substation intelligent fusion terminal 110 to the intelligent fuse 130, the incoming circuit breaker 140 and the interconnecting circuit breaker 150 to realize closing and opening; the substation intelligent fusion terminal 110 is responsible for interacting with the interconnection coordination control unit 120 to obtain the switch data of the substation and report it to the main station, and is also responsible for accepting and forwarding the control instructions of the main station to the interconnection coordination control unit 120; on the other hand, an interconnection control APP is installed internally to intelligently analyze and make decisions and control the switching of the interconnection mode.

[0045] Alternatively, if Figure 2 As shown, the interconnection coordination control unit 120 also includes an operation and maintenance function module 125, which is connected to the mobile terminal via Bluetooth and is used to exchange operation and maintenance function data with the mobile terminal via Bluetooth.

[0046] In the embodiment of the present invention, Figure 2 As shown, the substation intelligent fusion terminal 110 also includes a rigid interconnection control APP and a collection APP.

[0047] Figure 3 Schematic diagram of a software architecture provided according to an embodiment of the present invention. Figure 3 As shown, the intelligent fusion terminal 110 of the substation area also includes a data center. Specifically, the collection APP is responsible for obtaining the circuit breaker data and fuse data from the interconnection coordination unit and updating them to the data center. The rigid interconnection control APP obtains the circuit breaker data and fuse data of the two substation areas from the data center, and calculates the load rate of the two substation areas, and intelligently determines the control logic by judging the load rate status.

[0048] Embodiment 2

[0049] Figure 4 FIG. 1 is a flow chart of a control method for a rigid interconnection complete set of devices suitable for economic operation of a distribution station area according to an embodiment of the present invention. Figure 4 As shown, the method specifically comprises the following steps:

[0050] Step S402: Based on the fuse data and the circuit breaker data, respectively calculate the first load rate of the distribution transformer in the target distribution substation and the second load rate of the distribution transformer in the opposite distribution substation.

[0051] Step S404, based on the first load rate and the second load rate, respectively calculate the load rates of the substations in the interconnected operation mode, the independent operation mode and the parallel operation mode.

[0052] Step S406, determining a target operation mode based on the load rate of the substation and in accordance with the most economical method.

[0053] Step S408, based on the target operation mode, control the on and off of the intelligent fuses, incoming circuit breakers and tie circuit breakers of the two low-voltage interconnection complete sets of devices arranged in the target distribution substation area and the opposite distribution substation area.

[0054] Specifically, the load rate calculation includes the following steps:

[0055] 1) The interconnection coordination control unit 120 reads the active power, reactive power, and apparent power of the incoming circuit breaker 140 and the connecting circuit breaker 150 through RS485, calculates the actual load of the incoming circuit breaker 140 and the actual load of the connecting circuit breaker 150, and calculates the load rate β provided by the transformer进线1 , the load rate provided to the side area β 联络1 .

[0056] β 进线1 =S 进线1 ÷L 变1

[0057] β 联络1 =S 联络1 ÷L 变1

[0058] Among them, S 进线1 is the actual load of the incoming circuit breaker 140, S 联络1 is the actual load of the tie breaker 150, L 变1 is the rated capacity of the transformer.

[0059] 2) The interconnection coordination control unit 120 calculates the actual total load rate of the station area

[0060] β 总1 =β 进线1 +β 联络1

[0061] 3) Similarly, the interconnection coordination control unit 120 of the opposite station area can calculate the actual total load rate β of the opposite station area 总2

[0062] 4) The interconnection coordination control unit 120 of the substation obtains the load rate of the other side through peer-to-peer communication and sends it together with the load rate of the substation to the data center of the substation intelligent fusion terminal 110.

[0063] It should be noted that the interconnection load rate in the single operation mode is 0, and the total load rate is equal to the incoming line load rate.

[0064] The current operation mode logic judgment includes: the interconnection coordination control unit 120 obtains the switch position status of the fuse, incoming circuit breaker, and interconnection breaker in the current area and the fuse, incoming circuit breaker, and interconnection breaker in the opposite area, logically judges the operation status, and sends it to the data center. Among them, the relationship between the operation mode and the switch position status of the fuse and circuit breaker is shown in Table 1 below:

[0065] Table 1

[0066] switch Independent operation status #1 Operation, #2 Contact #2 Operation, #1 Contact Parallel operation #1 Zone Fuse combine combine point combine #1 Area incoming circuit breaker combine combine point combine #1 Area Interconnection Circuit Breaker point combine combine combine #2 Zone Fuse combine combine combine combine #2 Incoming circuit breaker combine point combine combine #2 Area Interconnection Circuit Breaker point point combine combine

[0067] Preferably, the method based on the most economical goal includes: the load rate in the economic operation range is 30% to 75%.

[0068] Specifically, the most economical operation mode is determined as follows:

[0069] Division of economic operation zone: The transformer is operated at rated load as the upper limit of the economic operation zone, and the other point with the same comprehensive power loss rate as the upper limit is the lower limit of the economic operation zone. The upper limit load factor of the economic operation zone is 1, and the lower limit load factor of the economic operation zone is

[0070] The best economic operation zone division: The transformer is operated at 75% load as the upper limit of the best economic operation zone, and the other point with the same comprehensive power loss rate as the upper limit is the lower limit of the best economic operation zone. The upper limit load factor of the best economic operation zone is 0.75, and the lower limit load factor of the best economic operation zone is in,

[0071]

[0072] Where:

[0073] β Jz ---Transformer comprehensive power economic load factor;

[0074] P 0Z ---Transformer comprehensive power no-load loss, in kilowatts (kW);

[0075] P KZ ---Transformer comprehensive power rated load power loss, in kilowatts (kW);

[0076] K T ---Load fluctuation loss coefficient.

[0077] Load fluctuation loss coefficient calculation formula

[0078]

[0079] Where: K f ---Shape coefficient

[0080] Shape factor calculation formula:

[0081]

[0082] Where:

[0083] T---Statistical period time, in hours.

[0084] A i ---The amount of electricity recorded per hour, in kilowatt-hours.

[0085] According to the above calculation and actual test data verification, the embodiment of the present invention defines the load rate of the economic operation range as 30% to 75%.

[0086] Specifically, step S406 also includes the following steps:

[0087] Step S4061, if the first load rate and the second load rate are both less than 30% in the independent operation mode, and the first load rate and the second load rate are both less than 75% in the interconnected operation mode, then the target operation mode is switched to the interconnected operation mode;

[0088] Step S4062: If the first load rate or the second load rate is greater than 75% in the interconnected operation mode, the target operation mode is switched to the independent operation mode.

[0089] Preferably, when switching the operating mode, the mode switch switching sequence is as follows: Figure 5 and Figure 6 As shown, Figure 5 is a schematic diagram of a switch switching sequence when switching from an independent operation mode to an interconnected operation mode provided by an embodiment of the present invention, Figure 6 The present invention provides a schematic diagram of a switch switching sequence when switching from an interconnected operation mode to an independent operation mode.

[0090] An embodiment of the present invention further provides a computer-readable storage medium, which stores computer instructions. When the computer instructions are executed by a processor, the method provided by the embodiment of the present invention is implemented.

[0091] It can be seen from the above description that the embodiment of the present invention provides a rigid interconnection complete set of equipment and control method suitable for economic operation of a distribution station area, which has the following technical effects compared with the prior art:

[0092] (1) The method provided by the present invention is to realize AC interconnection of substations through a fast-acting contact switch. Compared with flexible interconnection, the construction cost of flexible interconnection is dozens of times that of rigid interconnection, and the economic benefit is high.

[0093] (2) The present invention adopts the peer-to-peer communication technology between stations based on the interconnected coordination terminal, which realizes the information interaction between the two stations without distinction and improves the control efficiency.

[0094] It is known from common technical knowledge that the present invention can be implemented by other embodiments that do not deviate from its spirit or essential features. Therefore, the above disclosed embodiments are only illustrative in all respects and are not exclusive. All changes within the scope of the present invention or within the scope equivalent to the present invention are included in the present invention.

[0095] Those skilled in the art will appreciate that embodiments of the present invention may be provided as methods, systems, or computer program products. Therefore, the present invention may take the form of a complete hardware embodiment, a complete software embodiment, or an embodiment combining software and hardware. Moreover, the present invention may take the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) containing computer-usable program code.

[0096] The present invention is described with reference to flowcharts and / or block diagrams of methods, devices (systems), and computer program products according to embodiments of the present invention. It should be understood that each process and / or block in the flowchart and / or block diagram, as well as the combination of processes and / or blocks in the flowchart and / or block diagram, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing device to produce a machine, so that the instructions executed by the processor of the computer or other programmable data processing device generate instructions for implementing the processes in the flowchart and / or block diagram. Figure 1 A process or multiple processes and / or boxes Figure 1 A device that provides the functions specified in a block or multiple blocks.

[0097] These computer program instructions may also be stored in a computer-readable memory capable of directing a computer or other programmable data processing device to operate in a specific manner, so that the instructions stored in the computer-readable memory produce an article of manufacture comprising an instruction device, which implements the process Figure 1 A process or multiple processes and / or boxes Figure 1 A function specified in one or more boxes.

[0098] These computer program instructions can also be loaded onto a computer or other programmable data processing device so that a series of operating steps are executed on the computer or other programmable device to produce a computer-implemented process, thereby providing instructions for implementing the process. Figure 1 A process or multiple processes and / or boxes Figure 1 The steps for the functions specified in one or more boxes.

[0099] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the above embodiments, ordinary technicians in the relevant field should understand that the specific implementation methods of the present invention can still be modified or replaced by equivalents. Any modification or equivalent replacement that does not depart from the spirit and scope of the present invention should be covered within the scope of protection of the claims of the present invention.

Claims

1. A rigid interconnection device suitable for economical operation of distribution station area, It is characterized in that It includes two low-voltage interconnection complete sets of devices respectively arranged in the target distribution substation area and the opposite distribution substation area, and each low-voltage interconnection complete set of devices is respectively connected to the distribution transformer of the opposite distribution substation area; The low-voltage interconnection complete set includes: an intelligent fusion terminal in the substation area, an interconnection coordination control unit, an intelligent fuse, an incoming line circuit breaker and a connecting circuit breaker; wherein, The incoming end of the incoming circuit breaker is connected to the low-voltage pole of the distribution transformer, and the outgoing end of the incoming circuit breaker is connected to the low-voltage busbar in the cabinet; the intelligent fuse is arranged between the incoming pole and the high-voltage side of the distribution transformer; the incoming end of the connecting circuit breaker is connected to the low-voltage busbar in the cabinet, and the outgoing end of the connecting circuit breaker is connected to the outgoing end of the connecting circuit breaker of the opposite low-voltage interconnection complete set; The interconnection coordination control unit is respectively connected to the intelligent fuse, the incoming line circuit breaker, the tie circuit breaker and the substation intelligent fusion terminal; the interconnection coordination control unit is also connected to the interconnection coordination control unit of the opposite low-voltage interconnection complete set; the substation intelligent fusion terminal is connected to the cloud master station; The substation intelligent fusion terminal is used to obtain fuse data and circuit breaker data through the interconnection coordination control unit and report to the cloud master station, and receive control instructions from the cloud master station and forward them to the interconnection coordination control unit, so that the interconnection coordination control unit controls the on and off of the intelligent fuse, the incoming circuit breaker and the tie circuit breaker based on the control instructions; The substation intelligent fusion terminal is also used to control the switching of the operation mode based on the fuse data and the circuit breaker data; the operation mode includes an interconnected operation mode, an independent operation mode and a parallel operation mode.

2. According to claim 1, the rigid interconnection complete set suitable for economic operation of the distribution station area, It is characterized in that The incoming circuit breaker comprises a fast-acting intelligent incoming circuit breaker, and the connecting circuit breaker comprises a fast-acting intelligent connecting circuit breaker.

3. According to claim 1, the rigid interconnection complete set suitable for economical operation of the distribution station area, It is characterized in that The interconnection coordination control unit is respectively connected to the intelligent fuse, the incoming line circuit breaker, the connecting circuit breaker and the substation intelligent fusion terminal through RS485 bus communication.

4. According to claim 3, the rigid interconnection complete set suitable for economical operation of the distribution station area, It is characterized in that The interconnection coordination control unit includes a fuse acquisition module, a circuit breaker acquisition module, a communication unit interaction module and an upward communication module; wherein, The fuse collection module is used to interact with the intelligent fuse through the Modbus protocol, collect fuse data and issue fuse control instructions; the fuse data includes the three-phase position of the intelligent fuse; The circuit breaker acquisition module is used to interact with the incoming circuit breaker and / or the connecting circuit breaker through the DLT645 protocol to collect circuit breaker data and issue circuit breaker control instructions; the circuit breaker data includes voltage, current, power, and switch position information; The communication unit interaction module is used to interact with the interconnection coordination control unit of the opposite low-voltage interconnection complete set through a peer-to-peer communication protocol, exchange the fuse data and the circuit breaker data, and exchange control instructions on both sides; The upward communication module is used to send the fuse data and circuit breaker data of the target distribution substation and the opposite distribution substation to the substation intelligent fusion terminal through the DLT698 protocol, and receive the control instructions issued by the substation intelligent fusion terminal.

5. According to claim 1, the rigid interconnection complete set suitable for economical operation of the distribution station area, It is characterized in that The substation intelligent fusion terminal is connected to the cloud master station via 4G network communication.

6. The rigid interconnection complete set suitable for economical operation of distribution station area according to claim 1, It is characterized in that The interconnection coordination control units of the two low-voltage interconnection complete sets are connected via RS485 bus communication.

7. A control method for a rigid interconnection complete set of devices suitable for economical operation of a distribution station area as claimed in claim 1, It is characterized in that include: Based on the fuse data and the circuit breaker data, respectively calculating a first load rate of the distribution transformer of the target distribution substation and a second load rate of the distribution transformer of the opposite distribution substation; Based on the first load rate and the second load rate, respectively calculating the load rates of the substations in the interconnected operation mode, the independent operation mode and the parallel operation mode; Determine a target operation mode based on the load rate of the substation and in a most economical manner; Based on the target operation mode, the on and off of the intelligent fuses, incoming circuit breakers and connecting circuit breakers of two low-voltage interconnection complete sets of devices arranged in the target distribution substation area and the opposite distribution substation area are controlled.

8. The method according to claim 7, It is characterized in that The method based on the most economical goal includes: the load rate in the economic operation range is 30% to 75%.

9. The method according to claim 8, It is characterized in that Based on the load rate of the substation and in accordance with the most economical approach, a target operation mode is determined, including: If the first load rate and the second load rate are both less than 30% in the independent operation mode, and the first load rate and the second load rate are both less than 75% in the interconnected operation mode, switching the target operation mode to the interconnected operation mode; If the first load rate or the second load rate is greater than 75% in the interconnected operation mode, the target operation mode is switched to the independent operation mode.

10. A computer-readable storage medium, It is characterized in that The computer-readable storage medium stores computer instructions, and when the computer instructions are executed by a processor, the method according to any one of claims 7 to 9 is implemented.

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